Merge pull request 'Add Discord invite link' (#1) from dowoge/landing-page:add-discord-invite into master

Reviewed-on: StrafesNET/landing-page#1

index.html

@@ -192,7 +192,7 @@ DEALINGS IN THE SOFTWARE.
             <a href="#" class="link">Leaderboards</a>
             <a href="#" class="link">Tutorials</a>
             <a href="https://wiki.strafes.net" class="link">Wiki</a>
-            <a href="#" class="link">Discord</a>
+            <a href="https://discord.gg/Fw8E75X" class="link">Discord</a>
         </div>
 
         <!-- Footer -->